Furnace



Y 'PATENTE-D JAN l 5, 1904.

PURNAGE.

APPLIQA'TIQH FILED MAY 14, 190s.

im MoDEL.

2 SHEETS-@HEM 1..

[NI/ENTUR Y Y No. 748,833.

c. J. AN'DRUS. PURNAGE.

APPLICATION FILED HAY 14, 1903. I

2 SHEETS--SHEET 2` N0 HGDEL.

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PAT-ENT OFFICE. i

.CHARLES J. ANDRUS,` OF CINCINNATI, OHIO.

FU RNACE.

SEECIFICATIN forming part 0f Letters Patent o. 748,833, dated January 5, 1904.

' Application filed May 14, 1903. Serial No. 157,098. (No model.)

To all whom t may concern.-

Be it knownfthat I, CHARLES J; ANDRUS, a citizen of the United States of America, and a resident of Cincinnati, county of Hamilton, State of Ohio, have invented certain new and useful Improvements in Furnaces, of which the following is a specification. l y

My invention relatesVV to a furnace of the class that has drums through which the gases from the dome or combustion-chambercirculate before passing into the flue. Its object is a construction which has both this circuitous passage between the dome and likewise 'a short passage, with a ready means of throwing one or the other into use, and having an arrangement of drums and dome which offers a great amount of prime or heated surface evenly distributed through the jacket.

It is also an objectief my invention to have the connections between the drums and the combustion-chamber compact and in a form' convenient for manufacturing.

In the accompanying drawings I have illustrated a furnace embodying my invention.

In the drawings, Figure 1 is a perspective view of a furnace embodying my invention,

the casing or housing being broken away to disclose the dome and drums embodying my invention. Fig. 2 is. aside elevation of the furnace with the casing broken away, the forward end of the dome and drums being shown partly in section to disclose the headplate and damper. Fig. 3 is an end view of the same looking from the left in Fig. 2.

Referring tothe parts, casing A, with its side outlets a. and front outlets a', is of the same construction nowin use,asisalso theashpit B, dre-pot C, and the horizontal dome D.

The construction of the head-plate of the dome is novel and will now be described in detail. The hollow casting E, one side e of which forms the head-plate of the dome D, is divided by a horizontally-hinged damper e into an upper chamber e2 and a lower chamber es. Casting E has four radial forward projecting anges, the lower of which, c4 e5, lead into the chamber e3 and the upper of which, e6 el, lead into the chamber e2. Connected to the flange or arms e4 e5 are two horizontal drums F F', which run forward to the front end of the furnace parallel with the dome, and connected to the arms' e6 e7 are two similar drums F2 F3, which likewise run forward clear to the front of the furnace in a direction parallel with the drums. The forward end of the drum F is connected to the forward end of drum F2 by a vertical pipe F4, and the drums F' Fs are connected similarly by a vertical pipe F5. Damper e' has upon one end anv arm g, which is connected to a rod G, running forward through the front of the casing.- Chamber e2 has a flange e5 leading to the due above the damper e'. The head-plate e has an opening e placing the chamber e3 in communication with the interior of the dome. Arms c4 e5 e6 e'z are made of a length such that the drums stand clear of dome, leaving a space between them and the dome for the free circulation of the air in the jacket.

In use when the damper is closed, as shown in Fig. 2, the hot gases from the fire-pot rise up into the top of the dome and pass rearward, coming in contact with the headplate e, and are directed thence through the opening e9 into-the chamber es, passing thence downward through arms e4 e5 into the drums F F', thence forward into the pipes F'4 F5, into the drums F2 FS, thence rearward and downward into chamber e2, and then into the flue es.

Y It is seen that the air in the casing has a free circulationabout the dome and about the drums, so that the surface of both the the furnace, occasioning smoke, the damper being opened the products from the dome pass immediately from the chamber e2 into the due es.

It is seen that the head-plate, 4radial arms, and the return-flue all being formed in one casting are in a most convenientform for manufacture and that they are likewise in a form in which thedrums .are readily connected with a minimum amount of joints.

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This feature is of great importance, as in furnaces of this character it is desirous to have as few joints as possible, so as to prevent the possibility of gases passing into the air-j acket and thence into the rooms.

With my construction the drums are most readily cleaned, each of the drums having at its forward end a cap f, which may be removed for thatk purpose, and the head-plate is self-cleaning.

What I claim is- 1. In a furnace thecombination of a combustion-chamber, a hollow casting one side of which forms the head-plate of the combustion-chamber, a damper dividing the casting into two chambers one of which communicates with the combustion-chamber, the other to lead to a flue, and drums leading from one chamber of the casting into the other substantially as shown and described.

2. In a furnace the combination of a horizontal dome, a hollow casting, one side of which forms the head-plate of the dome, a horizontal damper dividing the casting into the lower chamber of the casting, the other leading into the upper chamber, and pipes connecting the other ends of the drums, substantially as shown and described.

3. In a furnace the combination of a horizontal dome, drums leading from the headplate downward and forward to the front of the furnace parallel to the dome leaving a space between it and the drums, similar drums leading from the front of the furnace rearward to a ilue, pipes connecting the forward ends of the lower and upper drums, a casing inclosing the parts having outlet-openings upon its front and sides, substantially as shown and described.

CHARLES J. ANDRUS.

Witnesses:

W. F. MURRAY, C. HOGAN. 

